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https://github.com/ntop/ntopng.git
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262 lines
7.7 KiB
Lua
262 lines
7.7 KiB
Lua
--
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-- (C) 2014-18 - ntop.org
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--
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local callback_utils = require "callback_utils"
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require "lua_utils" -- TODO: remove
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local json = require "dkjson"
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local top_talkers_utils = {}
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top_talkers_utils.MAX_NUM_ENTRIES = 10
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top_talkers_utils.THRESHOLD_LOW = .05
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local vlan_totals = {}
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local asname_cache = {}
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local hostname_cache = {}
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local localhost_cache = {}
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-- ########################################################
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local function updateCache(cache, key, val)
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if cache[key] == nil then
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cache[key] = val
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end
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end
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local function getCache(cache, key)
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return cache[key]
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end
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local function updateRes(res, vlan, what_key, what_value, direction, delta)
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if res == nil then res = {} end
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if res[vlan] == nil then res[vlan] = {} end
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if res[vlan][what_key] == nil then res[vlan][what_key] = {} end
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if res[vlan][what_key][direction] == nil then res[vlan][what_key][direction] = {} end
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if res[vlan][what_key][direction][what_value] == nil then res[vlan][what_key][direction][what_value] = 0 end
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res[vlan][what_key][direction][what_value] = res[vlan][what_key][direction][what_value] + delta
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end
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local function sortRes(res)
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for vlan_k, vlan_val in pairs(res) do
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for what_key_k, what_key_val in pairs(vlan_val) do
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for direction_key, direction_val in pairs(what_key_val) do
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local total, count, other = 0, 0, 0
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for what_val_k, delta in pairsByValues(direction_val, rev) do
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count = count + 1
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total = total + delta
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if delta <= 0 or count > top_talkers_utils.MAX_NUM_ENTRIES then
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if delta > 0 then other = other + delta end
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direction_val[what_val_k] = nil
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end
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end
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count = 0
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for what_val_k, delta in pairs(direction_val) do
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count = count + 1
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-- at least 5
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if (count > top_talkers_utils.MAX_NUM_ENTRIES / 2
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and delta / total < top_talkers_utils.THRESHOLD_LOW) then
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if delta > 0 then other = other + delta end
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direction_val[what_val_k] = nil
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end
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end
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if other > 0 then
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direction_val["Other"] = other
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end
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end
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end
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end
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end
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local function finalizeRes(res)
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for vlan_k, vlan_val in pairs(res) do
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for what_key_k, what_key_val in pairs(vlan_val) do
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for direction_key, direction_val in pairs(what_key_val) do
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for what_val_k, delta in pairs(direction_val) do
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local label = what_val_k
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if (what_val_k ~= "Other") and (what_val_k ~= "Hidden Hosts") then
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if what_key_k == "hosts" then
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label = getCache(hostname_cache, what_val_k)
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elseif what_key_k == "asn" then
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label = getCache(asname_cache, what_val_k)
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end
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end
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if label == what_val_k then
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-- Skip this label, as it is the same as the address
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label = nil
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end
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direction_val[what_val_k] = {address = what_val_k..'', value = delta, label = label}
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if what_key_k == "hosts" then
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direction_val[what_val_k]["local"] = tostring(getCache(localhost_cache, what_val_k) or "false")
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end
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end
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end
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end
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end
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-- Convert to the previous format
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local p = {}
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for vlan_k, vlan_val in pairs(res) do
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p[#p + 1] = vlan_val
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for what_key_k, what_key_val in pairs(vlan_val) do
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local s = {}
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for _, sender in pairs(what_key_val["sent"]) do
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s[#s + 1] = sender
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end
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local r = {}
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for _, receiver in pairs(what_key_val["rcvd"]) do
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r[#r + 1] = receiver
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end
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vlan_val[what_key_k] = {{senders = s, receivers = r}}
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end
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vlan_val["value"] = vlan_totals[vlan_k]
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vlan_val["address"] = vlan_k..""
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end
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return {vlan = p}
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end
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-- ########################################################
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function top_talkers_utils.makeTopJson(_ifname, save_checkpoint)
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local ifid = getInterfaceId(_ifname)
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if save_checkpoint == nil then save_checkpoint = true end
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local res = {}
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local in_time = callback_utils.foreachHost(_ifname, os.time() + 60 --[[1 minute --]], function (hostname, hoststats)
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local checkpoint = interface.checkpointHostTalker(ifid, hostname, save_checkpoint)
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if(checkpoint == nil) then
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goto continue
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end
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local current, previous
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if checkpoint["previous"] then previous = checkpoint["previous"] end
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if checkpoint["current"] then current = checkpoint["current"] end
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if not save_checkpoint and not previous then
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previous = {sent=0, rcvd=0}
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end
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local vlan = hoststats["vlan"]
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updateCache(hostname_cache, hostname, hoststats["name"])
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updateCache(localhost_cache, hostname, hoststats["localhost"])
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updateCache(asname_cache, hoststats["asn"], hoststats["asname"])
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if current and previous then
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for _, direction in pairs({"sent", "rcvd"}) do
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local delta = current[direction] - previous[direction]
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vlan_totals[vlan] = (vlan_totals[vlan] or 0) + delta
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local os_key = "non-local os"
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if hoststats["localhost"] then
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os_key = "local os"
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end
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local country = interface.getHostCountry(hostname)
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for what_key, what_value in pairs({
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["hosts"] = hostname, ["asn"] = hoststats["asn"],[os_key] = hoststats["os"],
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["countries"] = ternary(not isEmptyString(country), country, nil),
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["networks"] = hoststats["local_network_id"],
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}) do
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if hoststats.hiddenFromTop then
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what_value = "Hidden Hosts"
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end
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updateRes(res, vlan, what_key, what_value, direction, delta)
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end
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end
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end
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::continue::
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end)
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if not in_time then
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print("[".. _ifname .."] ERROR: Cannot complete top talkers generation in 1 minute. Is there a huge number of hosts in the system?")
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end
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sortRes(res)
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return json.encode(finalizeRes(res))
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end
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-- ########################################################
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-- Computes label and url during visualization
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function top_talkers_utils.enrichRecordInformation(class_key, rec, show_vlan)
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local url = ""
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local label = rec.label or rec.address
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if (rec.address ~= "Other") and (rec.address ~= "Hidden Hosts") then
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if class_key == "hosts" then
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url = ntop.getHttpPrefix()..'/lua/host_details.lua?always_show_hist=true&host='
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-- Use the host alias as label, if set
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local alt_name = getHostAltName(rec.address)
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if not isEmptyString(alt_name) and (alt_name ~= rec.address) then
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label = alt_name
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else
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local hinfo = hostkey2hostinfo(rec.address)
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if not show_vlan then hinfo.vlan = 0 end
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alt_name = host2name(hinfo.host, hinfo.vlan)
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if not isEmptyString(alt_name) and (alt_name ~= rec.address) then
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label = alt_name
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else
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label = rec.address
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end
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end
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elseif class_key == "asn" then
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url = ntop.getHttpPrefix()..'/lua/hosts_stats.lua?asn='
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elseif class_key == "networks" then
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url = ntop.getHttpPrefix()..'/lua/hosts_stats.lua?network='
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local network_name = nil
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if rec.address == "-1" then
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network_name = i18n("remote_networks")
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else
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network_name = ntop.getNetworkNameById(tonumber(rec.address))
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end
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if not isEmptyString(network_name) then
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label = network_name
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end
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elseif class_key:contains("os") then
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url = ntop.getHttpPrefix()..'/lua/hosts_stats.lua?os='
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end
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if not isEmptyString(url) then
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url = url .. rec.address
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end
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end
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-- Update record information
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rec.url = url
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rec.label = label
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end
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-- ########################################################
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function top_talkers_utils.enrichVlanInformation(vlan_tbl)
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local vlan_id = ternary(vlan_tbl.address, tostring(vlan_tbl.address), "0")
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vlan_tbl["label"] = vlan_id
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vlan_tbl["name"] = vlan_id
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vlan_tbl["url"] = ntop.getHttpPrefix()..'/lua/hosts_stats.lua?vlan='..vlan_id
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end
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-- ########################################################
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return top_talkers_utils
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